#include <stdio.h>

typedef unsigned char *byte_pointer;

void show_bytes(byte_pointer start, size_t len)
{
    size_t i;
    for (i = 0; i < len; i++)
        printf(" %.2x", start[i]);
    printf("\n");
}

void show_int(int x)
{
    show_bytes((byte_pointer)&x, sizeof(int));
}

void show_float(float x)
{
    show_bytes((byte_pointer)&x, sizeof(float));
}

void show_pointer(void *x)
{
    show_bytes((byte_pointer)&x, sizeof(void *));
}

int main()
{
    int val = 0x87654321;
    byte_pointer valp = (byte_pointer)&val;
    show_int(val);
    show_pointer(valp);
    show_bytes(valp, 1); // LSB
    show_bytes(valp, 2); 
}